His gear is just wonderful, every time I look, I find something else.
I know, right? There's a lot going on, again you're looking at 45 years of tweaking the details and I wasn't joking about the OCD. I'm trying to think if there's something you might have missed but I think you got all of it.
The Octopus regulator connected to the D-ring with the rubber keeper
That's not an octopus on the rubber keeper it's my primary, it's stored there between dives to keep it off the bench (explained in the first post).
two metal rings on that same D-ring. One for the camera and the red carabiner for the computer.
The red clip is a lightweight aluminum or plastic gadget I pulled from a keyring, it's used only to store the computers between dives, and yes the other ring is for the camera, there is one on each D ring. I clip the camera off to them when not holding it during the dive, and at the start and end of each dive.
In the picture with the camera, the octopus and computer are gone. Is it too crowded?
Again, it's not an octopus it's the primary regulator and the computers are on my wrists during the dive, the picture is to show how the BCD is configured during the dive.
On the left chest D-ring, there is a plastic hose clip keeper for something. I am guessing it is for the Pony SPG because the non-sided second stage from the Pony has a rubber necklace for some reason so I assume it comes from the left and the hose looks too short to wrap around the neck.
There is no pony spg, just the transmitter that sends the tank pressure to the the computer on my left arm. I stuck that hose holder on there after my last dive trip, I haven't used it yet, but on the next set of dives I want to see if I can run the pony hose through it to make it more comfortable as the it tends to pull on the regulator, which (you are correct) doesn't wrap around my neck. That hose holder might ultimately be clipped in a different spot or I'll just toss it if it doesn't do the job. I suspect it's too low to do any good.
But the mess of metal rings look like they are made to entangle with the plastic hose clip.
You may be right, but I haven't tried it yet, I don't know where that hose clip will actually be clipped or if it will even work as intended (it probably won't, it's too low). The camera clips hang straight down and the stony clip pulls to the side when the tank is hooked to it so they don't conflict. Those hanging quick links and round rings for the camera do not hang up on anything, I've changed them several times with different size clips for optimum size & length. In fact they were even longer at one point. The reason I don't just clip the camera directly to the D rings is that it's much easier to clip and unclip as there's a bit more slack in the configuration, it's not right up against my neck where I sort of have to fumble for it, and I can even leave the camera clipped and just lift it up and see through the viewfinder if I need to get a quick video of something going by.
The bottom right has a snap-buckle that has a single snap clip on a zip tie. What is that for?
Explained earlier (as was most everything else). It's a 3rd attachment point for my camera, it attaches to the metal round ring that is zip tied to one of the camera video lights (see first or second picture), to bring the bottom of the camera (which is otherwise hanging from the D rings) up & against my torso when close to the bottom, or in a wreck, when I'm not using the camera for long periods or at the end of a dive.
Thanks again for the time you clearly put into this, your non insulting critique and good questions, and for bringing up possible issues with the stony regulator hose. Other than making it longer or bungeeing it to the tank, if you have any other routing suggestions I'd really like to hear them.